If you have a fourth grader, you may be sitting on one of the best family travel deals in the country. The 4th Grade America the Beautiful Pass, officially part of the Every Kid Outdoors program, gives fourth graders and their families free access to thousands of federally managed public lands and waters across the United States. That means this could be the perfect year to plan a family road trip, visit national parks, explore national forests, and check some incredible destinations off your family’s bucket list — without paying the usual entrance fees. In fact, this is exactly what we’ve used multiple times; like our road-trip to 6 National…